How do you restore autoformat default settings in Access

[Tooty]

After I created a main form /subform, I tried to go back to format,
autoformat and change my the autoformate to Sandstone from Industrial.
However, I inadvertently customized the rice paper and sandstone paper theme
to be the same as the industrial theme. Is there anyway I can change this
back to it's original setting. I am working on a lab for school and I really
need this answered if at all possible.
Thanks.
Tooty